A Waste Heat Recovery System for Light Duty Diesel Engines

Paper #:
  • 2010-01-2205

Published:
  • 2010-10-25
Citation:
Briggs, T., Wagner, R., Edwards, K., Curran, S. et al., "A Waste Heat Recovery System for Light Duty Diesel Engines," SAE Technical Paper 2010-01-2205, 2010, https://doi.org/10.4271/2010-01-2205.
Pages:
7
Abstract:
In order to achieve proposed fuel economy requirements, engines must make better use of the available fuel energy. Regardless of how efficient the engine is, there will still be a significant fraction of the fuel energy that is rejected in the exhaust and coolant streams. One viable technology for recovering this waste heat is an Organic Rankine Cycle. This cycle heats a working fluid using these heat streams and expands the fluid through a turbine to produce shaft power. The present work was the development of such a system applied to a light duty diesel engine. This lab demonstration was designed to maximize the peak brake thermal efficiency of the engine, and the combined system achieved an efficiency of 45%. The design of the system is discussed, as are the experimental performance results. The system potential at typical operating conditions was evaluated to determine the practicality of installing such a system in a vehicle.
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